Chrono.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "Core/Types.h"
 
#ifdef CADKERNEL_DEV
#include <chrono>
#include <string>
#include <utility>
#endif
 
namespace UE::CADKernel
{
enum class ETimeUnit : uint8
{
    NanoSeconds = 0,
    MicroSeconds = 1,
    MilliSeconds,
    Seconds
};
 
#ifdef CADKERNEL_DEV
typedef std::chrono::high_resolution_clock::time_point FTimePoint;
typedef std::chrono::high_resolution_clock::duration FDuration;
#else
typedef uint64 FTimePoint;
typedef uint64 FDuration;
#endif
 
class CADKERNEL_API FChrono
{
    ETimeUnit DefaultUnit = ETimeUnit::NanoSeconds;
public:
    static const FTimePoint Now()
    {
#ifdef CADKERNEL_DEV
        return std::chrono::high_resolution_clock::now();
#else
        return 0;
#endif
    }
 
    static const FDuration Elapse(FTimePoint StartTime)
    {
#ifdef CADKERNEL_DEV
        return (std::chrono::high_resolution_clock::now() - StartTime);
#else
        return 0;
#endif
    }
 
    static const FDuration Init()
    {
#ifdef CADKERNEL_DEV
        return FDuration();
#else
        return 0;
#endif
    }
 
    template<typename Unit>
    static int64 ConvertInto(FDuration Duration)
    {
#ifdef CADKERNEL_DEV
        return std::chrono::duration_cast<Unit>(Duration).count();
#else
        return 0;
#endif
    }
 
    static void PrintClockElapse(EVerboseLevel Level, const TCHAR* Indent, const TCHAR* Process, FDuration Duration, ETimeUnit Unit = ETimeUnit::MicroSeconds);
};
}